PORTSMOUTH — The Portsmouth woman charged with lying to police about her whereabouts on the night UNH student Elizabeth Marriott was allegedly murdered will face a probable cause hearing this morning.

Kathryn “Kat” McDonough, 19, was ordered held on $35,000 cash bail or corporate surety at her arraignment in Derry Circuit Court on Wednesday, Dec. 26, following her arrest at her place of work in Newington on Christmas Eve.

Her hearing is scheduled for early this morning in Portsmouth Circuit Court.

McDonough, of 450 Greenside Ave., was arrested and charged with one felony count of hindering apprehension or prosecution and one felony count of conspiracy to commit hindering apprehension or prosecution. Both are Class B felonies, and each carries a sentence of up to 7 years imprisonment.

According to a shift supervisor at Hillsborough County House of Corrections, where McDonough was transferred to from Rockingham County jail, she posted bail on Sunday, Dec. 30 and was released at that time.

At her Derry arraignment, McDonough's attorney, Ryan Russman, told the court McDonough planned to stay with her parents in Portsmouth, directly across the street from her grandparents in the Elwyn Park neighborhood. McDonough's parents told the judge they understood the responsibilities placed on them to care for her.

According to a court document, McDonough allegedly agreed with her boyfriend, murder suspect Seth Mazzaglia, to “cause the commission of the crime of hindering apprehension or prosecution” regarding the investigation of Elizabeth “Lizzi” Marriott's disappearance and alleged murder in early October. Mazzaglia and McDonough both allegedly lied to police during interviews on Oct. 12 in Newington.

There, police say, Mazzaglia and McDonough gave investigators false alibis regarding their whereabouts Oct. 9 and their interaction with Marriott that night.

Mazzaglia is currently being held without bail and faces a second-degree murder charge in the disappearance of Marriott, for alleged suffocation or strangulation. Prosecutors are seeking an extension for an indictment of Mazzaglia, to postpone the grand jury proceedings until February.

Assistant Attorney General Peter Hinckley previously stated a search continues for Marriott's body, following a weeks-long search of waters near Peirce Island in Portsmouth in October but no positive results have turned up yet.